package cn.jindong.mall.search.thread;

import java.util.concurrent.*;

/**
 * @author LYX
 * @data 2022/4/5 16:10
 */
public class ThreadTest {

    public static ExecutorService service = Executors.newFixedThreadPool(10);

    public static void main(String[] args) throws ExecutionException, InterruptedException {
         System.out.println("main......start.....");
         Thread thread = new Thread01();
         thread.start();
         System.out.println("main......end.....");

         Runable01 runable01 = new Runable01();
         new Thread(runable01).start();

         FutureTask<Integer> futureTask = new FutureTask<>(new Callable01());
         new Thread(futureTask).start();
         System.out.println(futureTask.get());



         service.execute(new Runable01());
         Future<Integer> submit = service.submit(new Callable01());
         submit.get();

        System.out.println("main......start.....");
         CompletableFuture<Void> future = CompletableFuture
                 .runAsync(() -> {
                     System.out.println("当前线程：" + Thread.currentThread().getId());
                     int i = 10 / 2;
                     System.out.println("运行结果：" + i);
                 }, service);

        /**
         * 方法完成后的处理
         */
         CompletableFuture<Integer> future1 = CompletableFuture
                 .supplyAsync(() -> {
                     System.out.println("当前线程：" + Thread.currentThread().getId());
                     int i = 10 / 0;
                     System.out.println("运行结果：" + i);
                     return i;
                 }, service)
                 .whenComplete((res,exception) -> {
                     //虽然能得到异常信息，但是没法修改返回数据
                     System.out.println("异步任务成功完成了...结果是：" + res + "异常是：" + exception);
                 })
                 .exceptionally(throwable -> {
                     //可以感知异常，同时返回默认值
                     return 10;
                 });

        Integer integer = future1.get();
        System.out.println(integer);

        /**
         * 方法执行完后端处理
         */
         CompletableFuture<Integer> future2 = CompletableFuture
                 .supplyAsync(() -> {
                     System.out.println("当前线程：" + Thread.currentThread().getId());
                     int i = 10 / 2;
                     System.out.println("运行结果：" + i);
                     return i;
                 }, service)
                 .handle((result,thr) -> {
                     if (result != null) {
                         return result * 2;
                     }
                     if (thr != null) {
                         System.out.println("异步任务成功完成了...结果是：" + result + "异常是：" + thr);
                         return 0;
                     }
                    return 0;
                 });


        /**
         * 线程串行化
         * 1、thenRunL：不能获取上一步的执行结果
         * 2、thenAcceptAsync：能接受上一步结果，但是无返回值
         * 3、thenApplyAsync：能接受上一步结果，有返回值
         *
         */
        CompletableFuture<String> future3 = CompletableFuture
                .supplyAsync(() -> {
                    System.out.println("当前线程：" + Thread.currentThread().getId());
                    int i = 10 / 2;
                    System.out.println("运行结果：" + i);
                    return i;
                }, service)
                .thenApplyAsync(res -> {
                    System.out.println("任务2启动了..." + res);
                    return "Hello" + res;
                }, service);

        System.out.println("main......end....." + future.get());

    }

    private static void threadPool() {

        ExecutorService threadPool = new ThreadPoolExecutor(
                200,
                10,
                10L,
                TimeUnit.SECONDS,
                new LinkedBlockingDeque<Runnable>(10000),
                Executors.defaultThreadFactory(),
                new ThreadPoolExecutor.AbortPolicy()
        );

        //定时任务的线程池
        ExecutorService service = Executors.newScheduledThreadPool(2);
    }


    public static class Thread01 extends Thread {
        @Override
        public void run() {
            System.out.println("当前线程：" + Thread.currentThread().getId());
            int i = 10 / 2;
            System.out.println("运行结果：" + i);
        }
    }


    public static class Runable01 implements Runnable {
        @Override
        public void run() {
            System.out.println("当前线程：" + Thread.currentThread().getId());
            int i = 10 / 2;
            System.out.println("运行结果：" + i);
        }
    }


    public static class Callable01 implements Callable<Integer> {
        @Override
        public Integer call() throws Exception {
            System.out.println("当前线程：" + Thread.currentThread().getId());
            int i = 10 / 2;
            System.out.println("运行结果：" + i);
            return i;
        }
    }

}
